Multiscale Brazil nut effects in bioturbated sediment

Bibliographic Details
Title:	Multiscale Brazil nut effects in bioturbated sediment
Authors:	Tatiana Savranskaia, Ramon Egli, Jean-Pierre Valet
Source:	Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Publisher Information:	Nature Portfolio, 2022.
Publication Year:	2022
Collection:	LCC:Medicine LCC:Science
Subject Terms:	Medicine, Science
More Details:	Abstract Size segregation in granular materials is a universal phenomenon popularly known as the Brazil nut effect (BNE), from the tendency of larger nuts to end on the top of a shaken container. In nature, fast granular flows bear many similarities with well-studied mixing processes. Instead, much slower phenomena, such as the accumulation of ferromanganese nodules (FN) on the seafloor, have been attributed to the BNE but remain essentially unexplained. Here we document, for the first time, the BNE on sub-millimetre particles in pelagic sediment and propose a size segregation model for the surface mixed layer of bioturbated sediments. Our model explains the size distribution of FN seeds, pointing to a uniform segregation mechanism over sizes ranging from 1 cm, which does not depend on selective ingestion by feeding organisms. In addition to explaining FN nucleation, our model has important implications for microfossil dating and the mechanism underlying sedimentary records of the Earth’s magnetic field.
Document Type:	article
File Description:	electronic resource
Language:	English
ISSN:	2045-2322
Relation:	https://doaj.org/toc/2045-2322
DOI:	10.1038/s41598-022-14276-w
Access URL:	https://doaj.org/article/038e9f96c1d44774843c4b92aa87d437
Accession Number:	edsdoj.038e9f96c1d44774843c4b92aa87d437
Database:	Directory of Open Access Journals
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More Details
ISSN:	20452322
DOI:	10.1038/s41598-022-14276-w
Published in:	Scientific Reports
Language:	English